Weight Gain Blood Test

8 Biomarkers | Venous Blood Test | CE-marked | UKAS-accredited | Doctor-reviewed results with personalised interpretation.

A targeted blood test checking markers linked to unexplained weight gain, including advanced thyroid function, thyroid antibodies, long-term blood sugar control and testosterone. Designed for people who are gaining weight despite lifestyle changes or want to investigate metabolic and hormonal factors, this profile gives clear, clinically reviewed insight into markers that may influence weight, energy and metabolism.

Results are typically available within 2 working days from when your sample reaches the laboratory, excluding weekends and bank holidays.

£99.00

Taxes included. Shipping calculated at checkout.

Choose your sample collection method: Book a venous draw at our Livingston clinic Book a venous draw at home with a nurse +£63 Self-arrange a professional sample collection Partner clinic visit + £35.00 Finger Prick

Testosterone

HbA1c

Thyroid Peroxidase Antibodies
Thyroglobulin Antibodies

TSH
FT4
FT3
Thyroxine, T4

Fasting required 8–12 h before the test (water only) recommended for glucose, cholesterol/triglyceride accuracy
Sample timing: between 7:00 AM – 10:00 AM
Stay hydrated; avoid strenuous exercise, heavy meals, and supplements (iron, B12, multivitamins, biotin) for 48 hours prior
Continue prescribed medications unless otherwise directed

Frequently asked questions

It suits adults who have gained weight without an obvious change in diet or activity, particularly where the gain has been rapid or is concentrated around the abdomen. It checks thyroid function, blood sugar control and the hormones that influence fat storage.

Yes, please fast for 10 to 12 hours beforehand and drink only water. Recent food raises glucose and insulin, which would make those results difficult to interpret.

The two panels overlap considerably. This one is aimed at unexplained weight that has been gained, while the Can't Lose Weight panel is aimed at weight that will not shift despite effort. If you are unsure which fits your situation, contact us at hello@nuvivo.co.uk and we will advise.

Some medications, including certain antidepressants, steroids and hormonal treatments, are associated with weight change. This test does not measure drug levels, but it can show whether your thyroid and blood sugar regulation remain healthy. Never stop a prescribed medication without speaking to the prescribing clinician.

Your report explains the finding in plain language and sets out recommended next steps, which may include repeat testing, further investigation, or a discussion with your GP or a specialist.